Southwest Research Institute, San Antonio, Texas, has been awarded a $15,014,991 modification (P00006) to previously awarded cost-plus-fixed-fee contract HR001123C0116, to exercise Phase Two, Option One, for the Cancun program. This contract provides for distributable nodes to measure the high frequency (HF) radio environment for improved warfighter situational awareness in the critical HF radio band. Work will be performed in San Antonio, Texas (66%); Utica, New York (14%); Seattle, Washington (15%); and Chapel Hill, North Carolina (5%), with an expected completion date of February 2027. Fiscal 2025 research, development, test, and engineering funds in the amount of $4,000,000 are being obligated at time of award. The base contract was a competitive acquisition under broad agency announcement HR001123S0014 and was awarded on June 20, 2023. The Defense Advanced Research Projects Agency, Arlington, Virginia, is the contracting activity. (Awarded Feb. 5, 2025)